This is true that Essentia postponed mainnet release for indefinite term (probably for 1st quarter of 2019, but this is not exactly).

I read this in telegram...
Seems now everyone dissappointed in this project which have only false promised. They promised top 5 exchange during ICO, now they postponed mainnet.. The team looks like very unprofessional

This project turned into a shit show, yesterday they claimed that everything is on track and mainnet will be released this year, now it's postponed, token price already fell 40 times as of ICO, a masternode with a price about $4500 now costs $120. Team is very fishy, and the project turns out to be a scam, and AmaZix is covering scammers, lol! Old AmaZix admins disappeared from Telegram group, now there are new admins. Hope they get paid in ESS tokens at an ICO rate $0.043 per token.
Many believed in this project, but now seems it's time to writedown a loss and forget about it
They are probably forming new frauds called ess-x.